Folded structure for use in balloon-type structure, has upper folded hopper arranged between form edge and outlet, where distance of form edge from mirror plane with increased convergence at outlet is increased

摘要

The structure has an upper folded hopper (1) with two form edges lateral to each other with respect to a mirror plane and convergent to an outlet of the structure. The folded hopper is arranged between a third form edge (13) and the outlet. The distance of the third form edge from the mirror plane with the increased convergence at the outlet is increased. Another upper folded hopper (12) has a fourth form edge arranged laterally to the third form edge with respect to the mirror plane.